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feat: timezone-aware context injection for agent prompts (#691)

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* feat: per-group timezone architecture with context injection (#483)

Implement a comprehensive timezone consistency layer so the AI agent always
receives timestamps in the user's local timezone. The framework handles all
UTC↔local conversion transparently — the agent never performs manual timezone
math.

Key changes:
- Per-group timezone stored in containerConfig (no DB migration needed)
- Context injection: <context timezone="..." current_time="..." /> header
  prepended to every agent prompt with local time and IANA timezone
- Message timestamps converted from UTC to local display in formatMessages()
- schedule_task translation layer: agent writes local times, framework
  converts to UTC using per-group timezone for cron, once, and interval types
- Container TZ env var now uses per-group timezone instead of global constant
- New set_timezone MCP tool for users to update their timezone dynamically
- NANOCLAW_TIMEZONE passed to MCP server environment for tool confirmations

Architecture: Store UTC everywhere, convert at boundaries (display to agent,
parse from agent). Groups without timezone configured fall back to the server
TIMEZONE constant for full backward compatibility.

Closes #483
Closes #526

Co-authored-by: shawnYJ <shawny011717@users.noreply.github.com>
Co-authored-by: Adrian <Lafunamor@users.noreply.github.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

* style: apply prettier formatting

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

* refactor: strip to minimalist context injection — global TIMEZONE only

Remove per-group timezone support, set_timezone MCP tool, and all
related IPC handlers. The implementation now uses the global system
TIMEZONE for all groups, keeping the diff focused on the message
formatting layer: mandatory timezone param in formatMessages(),
<context> header injection, and formatLocalTime/formatCurrentTime
helpers.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* refactor: drop formatCurrentTime and simplify context header

Address PR review: remove redundant formatCurrentTime() since message
timestamps already carry localized times. Simplify <context> header to
only include timezone name.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: shawnYJ <shawny011717@users.noreply.github.com>
Co-authored-by: Adrian <Lafunamor@users.noreply.github.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Gabi Simons
2026-03-06 18:28:29 +02:00
committed by GitHub
parent 47ad2e654c
commit 632713b208
7 changed files with 114 additions and 41 deletions
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19
src/router.ts
View File

@@ -1,4 +1,5 @@
import { Channel, NewMessage } from './types.js';
import { formatLocalTime } from './timezone.js';
export function escapeXml(s: string): string {
if (!s) return '';
@@ -9,12 +10,18 @@ export function escapeXml(s: string): string {
.replace(/"/g, '&quot;');
}
export function formatMessages(messages: NewMessage[]): string {
const lines = messages.map(
(m) =>
`<message sender="${escapeXml(m.sender_name)}" time="${m.timestamp}">${escapeXml(m.content)}</message>`,
);
return `<messages>\n${lines.join('\n')}\n</messages>`;
export function formatMessages(
messages: NewMessage[],
timezone: string,
): string {
const lines = messages.map((m) => {
const displayTime = formatLocalTime(m.timestamp, timezone);
return `<message sender="${escapeXml(m.sender_name)}" time="${escapeXml(displayTime)}">${escapeXml(m.content)}</message>`;
});
const header = `<context timezone="${escapeXml(timezone)}" />\n`;
return `${header}<messages>\n${lines.join('\n')}\n</messages>`;
}
export function stripInternalTags(text: string): string {